WASHINGTON -- Halliburton Co. has told the Pentagon that two employees took kickbacks valued at up to $6 million in return for awarding a Kuwaiti-based company with lucrative work supplying U.S. troops in Iraq.

The disclosure is the first firm indication of corruption involving U.S.-funded projects in Iraq and raises new questions about Halliburton's dealings there. The company's work already is being scrutinized because of accusations that the U.S. government was overcharged for gasoline under another controversial contract.